What is needed to open a start-up fabless company in the filed of mixed signal IC design ?
What type of devices/IP need to be designed (Wireless, USB, ADC/DAC , Power Management , PLL etc...)?
How to find/attract customers ?
Where to fabricate the chip with the minimal cost ?
Let's assume that I have a all type software for designing the chip (schematic/layout capture software, RTL to GDS software).
In general, which steps need to be done for a success ?
Let's imagine the situation ... I can design ADC which is comparable with industry standards. I had fabricated the chip tested it and after show that I can design a chip from the scratch. So after all in this way I'm creating portfolio.
Can this be the first steps when after doing it , customers can rely on you and order a chip?
You need to know your competition and how to be better in some way; price, performance, delivery, support, warranty and not be significantly worse in others. A benchmark is needed with Case history to prove experience, otherwise, and you need angel funds for your venture, as production setup costs for fabless design service is not cheap or customers with deep pockets.